He fell, and became lame - Dislocated his ankle, knee, or thigh; which was never after reduced; and thus he became lame. Lovely Jonathan! unfortunate in thy life, and in thy progeny.
This mention of Mephibosheth seems to be inserted here partly to show that with the death of Ish-bosheth the cause of the house of Saul became hopeless, and partly to prepare the way for the subsequent mention of him 2 Samuel 9:1-13; 2 Samuel 16:1-4; 2 Samuel 19:25.